ENtiCe Project - Encouragement for Nicotine Cessation in pregnant smokers

Participants will be randomised to one of three trial conditions (smaller incentive vs. larger incentive vs. control). There will be two intervention groups, both of which will involve provding a Personal-Financial Incentive (PFI) to pregnant women who successfully abstain from smoking. The first intervention will involve a smaller PFI. Women randomly allocated to this first intervention group will be provided with the opportunity to receive a PFI at eight out of 10 study sessions, contingent upon smoking abstinence. This study will involve 10 study sessions 8 of which will be intervention sessions. The amount of the monetary reward will begin at $20 and will increase by a further $20 at every intervention follow-up session participants are found to abstain from smoking. Smoking abstinence will be assessed through a self-report survey and confirmed by saliva cotinine analysis. At each of the eight intervention follow-ups, women who biochemically-validated self-report smoking abstinence will receive their potential incentive for that follow-up period (i.e. $20 for the first follow-up). Eight intervention study sessions where women are eligible to receive a reward will be conducted. They will be conducted at study sessions held during womens scheduled antenatal appointments. These eight intervention study sessions will provide participants with an opportunity to receive a total of $720 if they cease smoking for the entire study period. The second intervention group will involve a larger PFI. Women randomly allocated to this second intervention group will be provided with the opportunity to receive a PFI at the eight intervention study sessions, contingent upon smoking abstinence. The amount of the monetary reward will begin at $40 and will increase by a further $40 at the eight intervention follow-up participants are found to abstain from smoking. Smoking abstinence will be assessed through a self-report survey and confirmed by saliva cotinine analysis. At each intervention follow-up, women who biochemically-validate self-report smoking abstinence will receive their potential incentive for that follow-up period (i.e. $40 for the first follow-up). Eight study sessions where women are eligible to receive a reward will be conducted (out of a total of 10 sessions). The intervention sessions will be conducted during womens scheduled antenatal appointments. These eight intervention study sessions will provide participants with an opportunity to receive a total of $1440 if they cease smoking for the entire study period. If a participant in both intervention groups fail to abstain at one of these eight intervention study sessions or do not present for their scheduled follow-up they will not receive the incentive for that period. However the incentive scheme will only ‘re-set’ to the amount the women were previously up to, therefore providing women with an opportunity to receive their incentive during their next intervention study session.